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RWE Power

New-build project: units D and E.

Westfalen poWer plant

RWE PoWER – all thE PoWER 3

thE PRojEct 5

hamm location 6

thE Plant and its functional PRinciPlE 9

functional aREas 12

EnviRonmEntal comPatibility 20

2 CoNtENt RWE PoWER – all thE PoWER 3

rWe poWer – all the poWerneW-build project: units d and e

in our business, we rely on a diversified primary

energy mix of lignite and hard coal, nuclear power,

gas and renewable sources to produce electricity

in the base, intermediate and peak load ranges.

RWE Power operates in a market characterized by

fierce competition. our aim is to remain a leading

national power producer and expand our international

position, making a crucial contribution toward

shaping future energy supplies.

a strategy with this focus, underpinned by efficient

cost management, is essential for our success.

all the same, we never lose sight of one important

aspect of our corporate philosophy: environmental

protection. at RWE Power, the responsible use

of nature and its resources is more than mere lip

service.

our healthy financial base, plus the competent and

committed support of some 17,000 employees under

the umbrella of RWE Power enable us to

systematically exploit the opportunities offered

by a liberalized energy market.

in this respect, our business activities are embedded

in a corporate culture that is marked by team spirit

and by internal and external transparency.

bundling all generation activities at RWE Power

has made us no. 1 in Germany, with a 30 per cent

share in electricity generation, and no. 3 in Europe,

with a 9 per cent share. We wish to retain this position

in future as well. that is what we are working for –

with all our power.

RWE Power is Germany's biggest power producer and a leading player in the extraction of energy raw materials. Our core business consists of low-cost, environmentally sound, safe and reliable generation of electricity and heat as well as fossil fuel extraction.

Bremen

Dortmund

Frankfurt

Mainz

Saarbrücken

Stuttgart

Munich

AachenCologne

Essen

Hard coal

Lignite with integratedopencast minesNatural gas

Nuclear power stationsOther conventionalpower plants

Hydropower stations**

* in deconstruction ** RWE Power including holdings as well as plants operated on behalf of RWE Innogy

thE PRojECt 54 thE PRojECt

the project

RWE Power in mid-february

filed an application with the

arnsberg regional government

for the construction and

operation of this power station.

this is a first step to create

a basis in approval law that

provides the flexibility needed

to implement the power plant by

2011, and is not yet associated

with any final construction

and investment decision. such

a decision requires that the

project can also be assessed

from an energy-policy angle.

the application records are

currently being scrutinized

by the authority. the arnsberg

regional government is in

charge of the approval

procedure.

the two 800-mW power-plant

units are to be operated with

hard coal and petroleum coke,

a coal-like residue from mineral-

oil processing. they are to go

on stream as units d and E in mid-

and end-2011. at that point in

time, the two old units a and b

will already have been shut down.

thanks to progressive technology,

the new power station will be

among the most modern of its

type worldwide. the plant is to

be operated initially in the base

load, although it can also be used

in the intermediate and partial

load at any time, i.e. in times of

increased or decreased electricity

needs.

the power-plant concept

is marked by the aim of high

net efficiency in generating

electricity from the fuel and,

associated with this, lower

specific emissions, high plant

availability, dependability as

well as economic efficiency.

the plant engineering deployed

to achieve these conditions

requires the highest steam

parameters, optimized power-

plant processes and optimized

plant engineering, in addition

to advanced technical concepts.

associated with this is the use

of high-quality, new materials,

specifically for the water-steam

cycle. moreover, the plant can

later be retrofitted with a co2

flue-gas scrubber with which

the co2 can be captured after

combustion and stored as soon

as this technology is ready for

deployment at power stations.

the new power-plant units are

largely designed for fully automatic

operation. monitoring of operations

is from a central control room.

the construction period

for the units, which will be built

successively, amounts to about

four years. RWE Power is investing

some € 2 billion in the location.

As part of its power-plant renewal programme costing € 6 billion, RWE Power AG proposes to build a hard coal-fired twin unit at its Westfalen location.

Key

1 Main switch house

2 Turbine house

3 Turbine house, intermediate building

4 Steam generator

5 Bunker bay

6 Electrostatic precipitator

7 FGD

8 Cooling tower

9 Gypsum-storage facility

10 Bin systems

11 Water centre

Layout of main construction site

hamm loCatioN 76 hamm loCatioN

hamm location

The two power-plant units are to be erected on today's plant premises in the Uentrop part of Hamm, in the Schmehausen communal district.

the hamm power-plant location can look back

on a long tradition: in 1962 / 63, the power station

Westfalen in the lippe meadows, east of uentrop-

schmehausen, entered into service. it went online

with the two 160-mW units a and b. in order to

meet the constantly growing demand for electricity,

above all by industry, the location was extended

in 1969 to include unit c with an electrical output

of 305 mW.

the three plants – along with the two new units

applied for – receive their main fuel, hard coal,

via the datteln-hamm canal, at the eastern end

of which the power plant is located. for some years

now, the power station has been producing up to

15 per cent of its furnace thermal rating not from

coal, but using a pyrolysis plant linked to unit c,

which carbonizes, e. g., old plastics and sorting

residues of high calorific value.

in 1985, the pebble-bed reactor thtR-300 was

commissioned on the power-station's grounds.

as early as 1989, the plant was shut down again,

freed from its essential radioactive components

and partially demolished. the remaining parts are

safely locked up pending final demolition.

the two new hard coal-fired power-plant units are to

emerge south of the old power station and will be

integrated completely into the existing location.

outside the power-plant area, no significant

additional space is needed.

this location is optimally connected to the traffic

network: in addition to its own harbour at the end of

the datteln-hamm canal, it has access to the rail

network of Ruhr-lippe-Eisenbahngesellschaft, which

inks up to the network of deutsche bahn via hamm's

railway station. autobahn a 2 runs some 650 m

northwest of the location.

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the plant and its functional principle

RWE Power not only wishes to

build two new units at the hamm

location. in addition, existing

plants and systems are to be

re-used and adapted to the

requirements of the new hard

coal-based units. for this, the

plants for materials handling, the

intermediate storage facility and

the conveyance of the coal must

be extended, for instance.

the two new units are designed

for fully automatic operation.

staff can monitor operations from

a central control room.

High efficiency, low specific emissions, exemplary availability and economic efficiency: these goals determine the design of the project.

thE PlaNt aND its fuNCtioNal PRiNCiPlE 98 thE PlaNt aND its fuNCtioNal PRiNCiPlE

Essential data of the new power station main technical data at nominal load (approximate figures)

furnace thermal rating mWt/h 2 x 1635 main steam generator

1 x 135 auxiliary steam generator**

Gross electrical capacity mW 2 x 800

net electrical capacity mW 2 x 765

net efficiency % approx. 46

fuel quantity t / h 2 x 240

main steam output kg / s 2 x 600*

main steam pressure/ main steam temperature

bar /° c 285* / 600*

hot reheat temperature ° c 610*

* at the steam-generator outlet

** auxiliary steam generator at nominal load not in operation;

is available for powering up the plant with a max. furnace thermal rating

of 150 MW

Clean-gas duct

Cooling tower

Sound-controlwall

Flue-gas desulphurization(FGD) plant

to FWWT

to FGD

Fine-PMhydrocyclone

Gypsumhydrocyclones

Vacuum-belt filter

Gypsumstorage hall

to gypsum recycling

Oxidationair

from fine-PMhydrocyclone

Induced-draught fan

Electrostaticprecipitator

Flue-gasdenoxing plant

from existingammoniastorage tank

Open pass

Steam generator (SG)

Coal bunker

Coal stockpiles

Portal scraper Rail unloading point Unloading cranes

Datteln-Hamm Canal

Furnace ash bins

Emergencyash removal

After-cooler

Intermediateconveyor

Crusher

to ash recyclingto ash recycling

Fly-ash bins

Limestonebins

Rail unloading point

Truck unloading point

Make-up water Carbonate slurryfrom CMT

Limestone slurry tankto

Datteln-Hamm Canal

to recycling

from fine-PMhydrocyclone to discharge

structure

Gypsumprecipitation

Coal beltFWWT sludge disposal

Heavy-metalseparation

FGD waste-watertreatment plant(FWWT)

to auxiliarysteamgenerator (ASG)

Fuel oil



Main transformer

Auxiliarytransformer

External-systemtransformer

te

110 kVexternal-systemfeed-in

Electrical auxiliaryrequirements

380-kV grid

Cooling water

Auxiliary steam generator (ASG)

Fuel oil

Demineralizedwater

Consumers

Auxiliarysteam mains

from CPP and DEMINhomogenizing tank

Service water

Process water

FGD make-upwater tank

from existingbiologicalpurificationplant

FGD process water

Regenerativeair heater

Dry-ash conveyor Coal mills

Primary-coolingwater pumps

Auxiliary-pumpbasin

Fire-fighting waterdistribution

Process waterFGD

Cooling tower dischargeto discharge structure

Cooling-tower basin

Feedwater tank

Turbine Generator

Condenser

HP heater LP heater

Turbofeedwaterpump

Turbo feedwaterpump driveturbine (FPDT)

FPDT condenser

Homogenizing tankMain-condensatepumps

Condensate-polishingplant (CPP)

Condensatebooster pumps

Start-upcondensate

to make-upwater tank

Cold-condensatestorage tank

Homogenizing tank

to make-upwater tank

Demineralized-waterstorage tank

to limestone slurry tank

Alternative:drinkingwater

Demineralizerplant (DEMIN)

Rainwater

Rainwaterbasin

Rainwater

Dischargestructure

from FWWT andauxiliary-pumpbasin

Intakestructure

Mechanicalpre-cleaning

Lippe

to coal belt

Chamberfilterpress

Carbonate slurry

Cooling towermake-up watertreatment plant(CMT)

Feedwatertank (ASG)

Cold reheat

Hot reheatMain steam

Steam pipes


The various functional areas of the planned hard coal-fired power plant are illustrated on the following pages.

The plant and its functional principle


diagram of a poWer plant unit

Energy conversion, environmental protection, logistics: a power station is a complex entity combining many different, inter-dependent technical sequences.

In a thermal power plant, chemi-

cal energy (from coal) is initially

converted into thermal energy by

combustion, then in a turbine

into kinetic energy and, finally,

by generator into electrical

energy. But that is not the whole

story. Round and about this core

process can be found a whole

host of activities that mainly

serve water and flue-gas treat-

ment and, hence, environmental

protection.

Fuels

the two new steam generators

are to use hard coal and petroleum

coke. Petcoke is a carbon-rich

residue from the mineral-oil

industry whose high calorific

value has been utilized in power

plants for decades. for the

start-up burners and the auxiliary

steam generator, which is only

to be used from time to time,

fuel oil is envisaged.

the fuels reach the power station

mainly via the datteln-hamm canal.

an alternative supply possibility

can be ensured by railway. unload -

ing facilities and coal stockpiles

will be expanded for the units d

and E. from there, the coal is trans-

ported by conveyor to the steam

generators' coal bunkers.

Steam generator

from the day bin, the fuel reaches

the coal mills where it is pulverized.

the pulverized coal is blown via

a swivel burner into the steam

generator's furnace.

the fire, at a temperature of up

to 1,250° c hot, evaporates water,

which flows through planar

superheater tube bundles in the

furnace and in the wall of the

steam generator. there, the fully

desalinated and demineralized

water, which a power-plant

operative refers to as feedwater,

evaporates to make so-called

main steam. it leaves the steam

generator at a temperature of

600° c and a pressure of 285 bar.

thus charged with energy, it flows

into a turbine.

during combustion, ash, too, is

produced in addition to thermal

energy. it is withdrawn in a dry

state from the steam generator's

ash hopper, stored in bins and

utilized.

Water-steam cycle

the high-pressure steam produced

in the steam generator enters the

high-pressure section of the steam

turbine and does mechanical

work there, while expanding and

cooling. to achieve a high overall

efficiency, the steam, after leaving

the high-pressure section, is re-

routed into the steam generators

and reheated.

the superheated steam is

again sent back to the turbine

in the double-flow medium-pres-

sure section and does further

mechanical work, while expanding

and cooling further. after leaving

the medium-pressure section,

the steam flows into the steam

turbine's low-pressure section,

each of which are designed dou-

ble-flow, where further mechani-

cal work is performed, expanding

and cooling down

to exhaust-steam pressure level.

to ash recycling

Furnace ash bins

Emergency ash removal

After-cooler

Intermediate conveyor

Crusher

Primary-air fan Forced-draughtfan

Dry-ash conveyor Coal mills

Burner

Fuel oil

to electrostaticprecipitator

Regenerative air heater

Flue-gas denoxing plant

from existingammonia storagetank

Open pass


from turbine

to turbine

Coal bunker

from feedwater pump

Coal stockpiles

Portalscraper Rail unloadingpoint

Unloading cranes

Datteln-Hamm Canal

Steam generator with fuel supply and furnace ash disposal

the exhaust steam is condensed

in the condenser using the pri-

mary-cooling water.

the main-condensate pumps

feed the produced main condensate

to the low-pressure (lP) heaters

and the feedwater tank and,

in the process, reheat it in the

various feed-heating stages

using extraction steam from the

turbine. from the feedwater tank

the feedwater pumps withdraw

the necessary feedwater and re-

feed it into steam generator,

after having increased the

pressure and reheating even more

in the high-pressure (hP) heater.

to achieve high overall efficiencies,

the pre-heating section (lP and

hP heaters) is in 9 stages. in the

condensate-polishing plant (cPP),

the condensate is continuously

polished mechanically and chemi-

cally.

the turbo feedwater pump (tfP)

is driven by a separate feedwater

pump drive turbine (fPdt). in nor-

mal operations, it is supplied with

steam by extraction from the

main turbine. to supplement the

tfP, the plant has a feedwater

pump unit driven by electric

motor (EfPu).



to auxiliary steam distributorto �ue-gas scrubber

Cold reheat

Hot reheat

Main steam

Steam pipes

Feedwater tank

Turbine Generator

Condenser

HP heater LP heater

Turbo feedwaterpump

Turbo feedwaterpump driveturbine (FPDT)

Demineralizedwater fromDEMIN plants

to homogenizing tank

Main-condensate pumps

Condensate-polishingplant (CPP)

FPDT condenser

Main-condensate booster pumps from coolingtower

to coolingtower

Water-steam cycle

RWE Power is actively backing

the tapping of profitable district-

heating and process-steam poten-

tials in the vicinity of the power-

plant location: for this, steam

extraction in the medium-

pressure section of the steam tur-

bine is planned-in for both units.

there, the turbine is dimensioned

in such a way that retrofitting

for steam extraction becomes

possible.

Power generation

the generator is linked to the

turbine via a shared shaft. it

converts its rotary motion into

electricity according to the dynamo

principle. the electricity has a

voltage of 27,000 v. its voltage

has still to be increased by the

power plant's main transformer

to 380,000 v for feed-in into

the supergrid. a small part of the

electric energy produced in the

generator is used for the power

station's own needs, although

these can also be covered by

feed-in from the supra-regional

110,000-v grid.Clean-gas duct

Cooling tower

Sound-controlwall

from �ne-PM hydrocyclone

Oxidationair

fromFGDmake-upwatertank Induced-draught fan

Electrostaticprecipitator

fromprimary-air fan

from forced-draught fan

to the coal mills

to burner

from steam generator

to FWWT

to FGD

Fine-PMhydrocyclone

Gypsumhydrocyclones

Vacuum-belt �lter

Gypsum storage hall

to gypsum recycling

from �ne-PMhydrocyclone to discharge

structure

Gypsum precipitation

Coal belt FWWT sludgedisposal

Limestone bins



Make-up water Carbonateslurry fromCMT

Limestone slurry tank

Datteln-Hamm Canal to recycling

Fly-ash bins

Flue-gas desulphurization plant (FGD)

Flue-gas denoxing plant

to ash recycling

Flue-gas path and flue-gas scrubbing

Flue-gas scrubbing

the steam generators are equipped

with pulverized-coal burners which

are operated with low excess air

and optimized airflow. this reduces

the emergence of nitrogen oxides

in combustion from the word go.

in addition, nitrogen oxides are

reduced in a downstream flue-gas

denoxing plant. there, the nitrogen

oxides react with ammonia using a

catalyst to become water and pure

nitrogen, the natural components

of air.

after that, the flue gases flow

through electrostatic precipitators:

they separate 99.9 per cent of the

dust by electrostatically charging it

via discharge electrodes and drawing

it to oppositely charged surfaces.

in a next step, the sulphur dioxide

contained in the flue gas is converted

in the atomized spray of a limestone

slurry into calcium carbonate, i.e.

gypsum, which can be used in the

construction-material industry.

the scrubbed flue gases are

discharged via the cooling tower.


Emissions

Germany's 13th ordinance on

air Pollution control and noise

abatement (bimschv) applies

to the input of hard coal and

petroleum coke in the new

units. the emission thresholds are

reliably observed. as evidence,

the concentrations of dust, sulphur

dioxide, carbon monoxide and

nitrogen oxides in the flue-gas

duct are continuously measured

and analysed. all relevant

emissions are transmitted to

the supervisory authority using an

officially recognized measuring

and monitoring system by online

data transmission.

the noise-emission threshold

under the technical instructions

on noise (ta lärm), too, are

observed. this is ensured, inter

alia, by the planned sound-control

walls at the base of the cooling

towers, and by insulating plant

parts, like the induced-draught

fan. this was established by

an independent expert with

a detailed forecast for six

measurement points in the plant's

environs. the total emissions to be

expected were established

and assessed by an independent

expert, taking account of the

initial pollution level within

the scope of a detailed noise-

emission forecast in the

run-up.

Cooling tower

Powerful pumps transport the

cooling water, at about 27° c,

from the condenser to the cooling

tower. there, it falls as rain at a

height of some 15 m. in the upwind

of the cooling tower (stack effect),

it cools down to about 17° c.

in the process, a small part of

the cooling water evaporates and

must be replaced. a much larger

share is collected in the so-called

cooling-tower basin and pumped

back to the condenser. so that the

cooling towers can adhere to the

noise thresholds, a sound-control

wall is built around its base.

Substance Daily average value pursuant to 13th BImSchV mg/m3 STP, dry

Half-hourly values pursuant to 13th BImSchV mg/m3 STP, dry

total dust 20 40

so2 200 400

degree of sulphur separation

> 85 % > 85 %

no2 200 400

hg bei 6 % o2 0.03 0.05

co bei 6 % o2 200 400

mittelwert über die Probenahmezeit

(i. n.,tr. 6 % o2)

mittelwert über die Probenahmezeit

(i. n.,tr. 6 % o2)

cd, ti 0.05 mg/m³ 0.05 mg/m³

sb, as, Pb, cr, co, 0.5 mg/m³ 0.5 mg/m³

cu, mn, ni, v, sn

as, cd, co, cr, benzo(a)pyrene

0.05 mg/m³ 0.05 mg/m³

dioxins and furans 0.1 ng/m³ 0.1 ng/m³

Clean gas

Primary-coolingwater pumps

Auxiliary-pump basin

Fire-fighting waterdistribution

FGD process water

Cooling tower dischargeto discharge structure

from condensert o condenser

Cooling tower

Sound-controlwall

Cooling-tower basin

Cooling tower and cooling-water cycle

Key 1 Main switch house 2 Turbine house 3 Turbine house, intermediate building 4 Steam generator 5 Bunker bay 6 Electrostatic precipitator 7 FGD 8 Cooling tower 9 Gypsum-storage facility 10 Bin systems 11 Water centre

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from condenser

to primary-cooling water pump

to condenser

Homogenizing tank

Demineralized-water storage tank

to limestone slurry tank

to FGD make-up water tank

Alternative:drinking water

Demineralizer plant (DEMIN)

Rainwater

Rainwater basin

Rainwater

Dischargestructure

from FWWT andcooling towerdischarge

Intakestructure

Mechanicalpre-cleaning

Lippe

to coal belt

Chamber filter press

Carbonate slurry

Cooling tower make-up watertreatment (CMT) plant

Water-treatment plants

Water treatment

Power plants have two major water

cycles: the water-steam cycle

between steam generator, turbine

and condenser, and the cooling-

water cycle between condenser

and cooling tower. the two cycles

are not completely closed, but

depend on additions of water,

although the required water

quantities must be expensively

treated before being used.

in the evaporation in the cooling

tower, the extraneous, dissolved

minerals stemming from the lippe

river remain in the cooling water

and would impair its quality with

growing concentration. this being

so, a sub-stream of the cooling

water is separated and re-used in

the power-plant process as far as

possible. any unusable amounts

are sent back to the lippe.

the water amounts to be replaced

are withdrawn from the lippe as raw

water. first, they are mechanically

Important mass flux in normal operations (approximate values)

furnace ash 8 t/h

fly ash 70 t/h

Gypsum 50 t/h

fGd waste water 12 t/h

cooling tower discharge 500 t/h

cooling tower exhaust air 1,600 t/h

flue gas 33100 t/h (incl co2: 1,300 t/h)

Energy 2 x 765 mW (net)

Pulverized limestone 26 t/h

ammonia 0.4 t/h

fuel 480 t/h

Raw water 2,500 t/h

pre-cleaned using racks and screens.

the raw water is then brought up

to the necessary water quality in a

treatment plant and added to the

primary-cooling water.

by contrast, the water envisaged

for the water-steam cycle must

go through one more step:

demineralization in a special plant.

alternatively, there is also the option

of supplying the demineralizer

plant with drinking water.

Backed by a number of technical expertises and

data from the specialist authorities of the state of

North Rhine-Westphalia (NRW), the implications for

natural assets worthy of protection under the Law

on Environmental Compatibility were established,

taking account of the various interactions.

Air

to establish the initial pollution level, the data avail-

able from measuring stations of the state office for

nature, the Environment and consumer Protection

nRW were analysed. by way of precaution, the initial

pollution level was measured in addition at three

locations (vicinity, lippborg, beckum). the measure-

ments comprised the parameters dustfall and fine

dust, each with an analysis of the heavy-metal

concentrations, nitrogen oxides, sulphur dioxide,

chlorine, fluorine, dioxins/furans and benzo(a)pyrene.

the analysis of the available data from the

measuring network of the state of nRW and the

results of the initial pollution level measurements

showed that the initial level of all air pollutants is

below or largely well below the air-quality thresholds.

using the calculation methods prescribed by

the technical instruction on air-Quality control

(ta luft), the additional air pollution from the new

units was calculated, and the total pollution to be

expected established. in addition, and by way of

precaution, the extra pollution was established

for which the ta luft lists no air-quality thresholds.

the calculated additional pollution refers in each case

to the least favourable situation in the investigated

area and to the max. permissible emissions from the

new units. in normal operations, actual emissions and,

hence, the additional pollution, too, are lower.

the bottom line of this observation is that the

permissible air-quality thresholds will be undercut

in future total levels for all pollutants as well.

Climate

as regards the investigated meteorological parameters

clouding, fog formation, humidity, precipitation

amount as well as dew, white-frost and ice formation,

merely short-term implications for the environs are

forecast. measurable effects in an annual mean are

only expected from the shadow cast by the cooling

towers and their plumes, and from the associated

reduction in the hours of sunshine. the project is not

expected to bring any overall, relevant changes to

the micro-climate in the environs of the plant

location.

The environmental-protection measures envisaged for the new power-plant units safely adhere to all statutory specifications. All the same, it is necessary to check whether the new units will have any impact on the environment, so that the project's environmental compatibility was investigated and assessed by TÜV NORD Systems GmbH & Co. KG as experts.

since the emission allowances allocated to the

power-plant new-build under Germany's Greenhouse-

Gas Emission trading law (tEhG) are allocated in

line with the total co2 emission amounts available,

and any difference must be covered by buying in

emission rights, it is ensured that the co2 emissions

from operating the planned hard coal-fired twin

units slot into the national climate-protection

concept for lowering greenhouse gases.

Prepared for CO2 capture

RWE Power feels an obligation to meet the energy

and climate targets, so that the company is engaged

in vigorous research into zero-co2 coal-based power

generation. for this, RWE Power is investing well

above € 1 billion. from the results, the power station

in Westfalen, too, will benefit. the new units are

already designed in such a way that they can later

be retrofitted with economically defensible co2 flue-

gas scrubbers.

Soil

the two new power-plant units will be erected on

the existing power-station terrain. for the structures

and traffic infrastructure, a surface of some 11 ha will

be used and permanently concreted. further surfaces

on a scale of 25 ha will be used temporarily during

the construction phase. no particularly sensitive or

soil worthy of protection is affected by the land use.

due to the low additional burdens from air pollutants

resulting from the operation of the plant, no relevant

additional pollution need be expected for the soil in

the two units' area of impact owing to the deposition

of air pollutants.

Water

Water, as an asset worthy of protection, is divided

into groundwater and surface water.

according to the results of the soil analyses,

no extensive lowering of the groundwater level

is necessary during construction.

ENviRoNmENtal ComPatibility 2120 ENviRoNmENtal ComPatibility

environmental compatibility

the sealing of the surfaces for the structures and

traffic infrastructure leads to a lowering of the local

rate of groundwater recharge. owing to the newly

concreted surfaces and the groundwater situation,

no change to the regional rate of groundwater

recharge is expected, however. since – due to the

low additional burdens from air pollutants resulting

from the operation of the plant – no relevant

additional pollution is to be expected for the soil in

the two units' area of impact from the deposition of

air pollutants, no relevant additional pollution for

the groundwater via the soil > groundwater impact

path need be assumed, either.

among the surface waters, the lippe river is of

special significance, because water is withdrawn

from the lippe to offset the evaporation losses

in the heat discharged via the cooling towers, and

some of the cooling-tower water is discharged into

the lippe together with the treated fGd waste water.

the lippe, in the area between hamm and the

confluence with the Rhine, is affected by numerous

waste-water discharges and water withdrawals

for cooling purposes. accordingly, it is burdened

materially and thermally. the largest quantity of the

water discharged by the Westfalen power plant has

the quality of concentrated lippe water without any

relevant, chemical additions. due to the low amount

of treated fGd water discharged, relative to the

lippe's flow rate, no relevant changes to the

chemical water quality of the lippe downstream

of the discharge point need be expected in the

future.

the warming of the lippe water associated with

the discharge of cooling water is restricted under the

specifications of Germany's fish-Water Quality

ordinance (fGQv). the max. warm-up range will

amount to 3° K in future. normally, the warm-up

range in the aimed-at operating mode, at values

of 0.2-0.3 K, will be well below this.

overall, no relevant changes to the lippe's water

quality are expected from the water withdrawals

and the discharges. this being so, no substantial,

adverse implications for the flora and fauna in the

lippe need be feared. for the waters in the power

plant's farther environs, just like in the case of soil

and groundwater, what applies is that, due to the

low additional burdens from air pollutants resulting

from the operation of the plant, no relevant

additional burden from the deposition of air

pollutants is forecast.

Plants, animals, biotopes, landscape

With the erection of the structures and the traffic

infrastructure, incl ancillary surfaces, biotopes on

an area of some 20 ha will be permanently used up.

furthermore, a surface totalling about 25 ha will be

needed during the construction phase for site set-up

surfaces, parking spaces and infrastructure facilities.

the area affected by the building interference are

mainly fallow surfaces on the works' terrain involving

wild-growing areas, bushes and young succession-

forest surfaces. the biotopes used during the con-

struction phase mainly concern arable land, some

fallow arable land as well, grassland and copses. no

biotopes specially worthy of protection are used.

the project is also associated with impairments to

the fauna – especially bird fauna – by the loss of

breeding habitats, noise and disruptive effects.

no disadvantageous implications for plants, animals

and biotopes from air pollutants need be expected

due to the low additional pollutants resulting from

operating the plant. this is true of both direct impli-

cations from gaseous pollutants and dusts, and of

implications via the soil > plants > animals path by

any enrichment with pollutants down the food chain.

overall, the impairments for plants, animals and bio-

topes must be classified as considerable due to the

land use. however, thanks to the envisaged compen-

sation measures, these are offset in their entirety.

the construction of the two units with two cooling

towers measuring approx. 165 m as the biggest

structures will also cause a considerable impairment

of the landscape within a radius of some 10 km. in

this respect, it must be taken into account that the

power-plant location is already marked by industrial

use and, due to the existing power station with its

cooling towers, a considerable initial burden exists

for the landscape.

the interference with nature and landscape is

compensated in line with the specifications

of nRW's landscape act by taking landscape-

management measures. the measures are described

in an accompanying landscape conservation plan.

Humans

Relevant impairments for the residents in the power

plant's vicinity need be expected neither from air

pollutants nor from noise. in both cases, the various

air- and noise-pollution thresholds will be safely

observed in the future as well.

any strain on the air from germs constituting a

health hazard can likewise be excluded. this is

evidenced by measuring the germ pollution in the

cooling water and the air at comparable locations.

overall assessment of environmental compatibility

overall, the investigations and data analyses showed

that the impairments of air, climate, soil and water

must be classified as low and, hence, as insignificant.

for humans, too, no relevant impairments are expected.

Plants, animals and humans are exposed neither

directly nor indirectly via interaction to any relevant

pollutants. any impairments for nature and landscape

resulting from the use of biotopes during the project

and any implications for the landscape are offset by

taking landscape-management measures.

ENviRoNmENtal ComPatibility 2322 ENviRoNmENtal ComPatibility

RWE Power AG

Essen/Cologne

I www.rwe.com CCs_

0510

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